X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6496918 for lml@lancaironline.net; Mon, 30 Sep 2013 19:01:17 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=hWFb9yULoe7p2xhF3gprx38YJd6ZJxmZAJ1bU50lXeLYTxa1RovEQiaTkzUb8/w7; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [71.161.219.193] (helo=[192.168.1.104]) by elasmtp-kukur.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1VQmSG-0006Z7-Pc for lml@lancaironline.net; Mon, 30 Sep 2013 19:00:41 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-76-695398179 Subject: Re: [LML] Re: WX 500 Stormscope False Strikes Date: Mon, 30 Sep 2013 19:00:40 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: <4BCAE5C8-9E16-49FF-A037-3E790F77BA6B@earthlink.net> X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940c47b7b428d31bdc6e0e86de36129342f350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 71.161.219.193 --Apple-Mail-76-695398179 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii There are limited location options on a IV-P. Question for the A/P gurus:=20 Do these stepper motors make electrical noise when they are holding a = position or only when they are moving? The stormscope has an inhibit line. I have mine wired so that the = inhibit is on whenever the hydraulic pump is on. (actually when it's on = and a few milliseconds afterward) I wonder if it's practical to develop = an inhibit signal for the a/p servo which has a low duty cycle. On Sep 30, 2013, at 12:58 PM, Mike Larkin wrote: I use to install WX500's and the like when I worked at the Avionics shop = up in Albany NY years ago. The Storm Scope system has a very sensitive = antenna. Many items interfere with this system. The company has a tool = that maps the best location for there antenna. One of you local shops = may have a mapper. You many have to lease a loaner or go to a service = center. If you are looking to do it on the cheep, move the antenna as = far away from any motors, output antennas, and hi voltage(strobe lights) = items as you can. Try to copy someone that has had success with the = same setup including AP servo locations. Mike Larkin On Sun, Sep 29, 2013 at 7:53 PM, Craig Berland = wrote: I have a WX 500 Stormscope installed in my IV-P. With the autopilot = turned off it works perfectly but with the autopilot on, it lights up = with false strikes. I suspect the AP servo motor near the WX 500 = antenna is the culprit. Do you antenna/electronics experts believe I = would be successful shielding the antenna with lead foil either at the = antenna or at the servo motor? Craig Berland N7VG Sent from my iPad -- For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html --=20 Mike Larkin LarkinAviationConsulting LegacyL2K@gmail.com 602-770-6054 --Apple-Mail-76-695398179 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii There = are limited location options on a IV-P.

Question for = the A/P gurus: 
 Do these stepper motors make = electrical noise when they are holding a position or only when they are = moving?

The stormscope has an inhibit line. =   I have mine wired so that the inhibit is on whenever the = hydraulic pump is on.  (actually when it's on and a few = milliseconds afterward)  I wonder if it's practical to develop an = inhibit signal for the a/p servo which has a low duty = cycle.

On Sep 30, 2013, at 12:58 PM, Mike Larkin = wrote:

I use to install WX500's and the like when I worked at = the Avionics shop up in Albany NY years ago.  The Storm Scope = system has a very sensitive antenna.  Many items interfere with = this system.  The company has a tool that maps the best location = for there antenna.  One of you local shops may have a mapper.  = You many have to lease a loaner or go to a service center.  If you = are looking to do it on the cheep, move the antenna as far away from any = motors, output antennas, and hi voltage(strobe lights) items as you = can.  Try to copy someone that has had success with the same setup = including AP servo locations.

Mike Larkin


On Sun, Sep 29, 2013 at 7:53 PM, Craig Berland = <cberland@systems3.net> wrote:
I have a WX 500 = Stormscope installed in my IV-P.  With the autopilot turned off it = works perfectly but with the autopilot on, it lights up with false = strikes.  I suspect the AP servo motor near the WX 500 antenna is = the culprit. Do you antenna/electronics experts believe I would be = successful shielding the antenna with lead foil either at the antenna or = at the servo motor?
Craig Berland
N7VG

Sent from my iPad



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Mike = Larkin
LarkinAviationConsulting
LegacyL2K@gmail.com
602-770-6054

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